title: Determination of glycemic monitoring marker 1,5-anhydroglucitol in plasma by liquid chromatography-electrospray tandem mass spectrometry.
abstract: Previous studies have shown that plasma 1,5-anhydroglucitol (1,5-AG) is markedly reduced among diabetic patients and therefore serves as a sensitive marker for short-term glycemic control. The current study describes the development of the liquid chromatography negative ion electrospray tandem mass spectrometry (LC-MS/MS) method to measure 1,5-AG in human plasma. The samples were pre-treated with protein precipitation and an isotope-labeled internal standard was used. Chromatographic separation was achieved on amide column (150 mm x 2.0mm i.d., 5 microm) followed by detection with multiple reaction monitoring mode. Linearity, accuracy, precision, recovery, matrix effect, and stability were evaluated during method validation over the range of 1-50 microg/mL. The validated method has been clinically applied among 159 type 2 diabetic patients and 290 control subjects. A marked reduction in 1,5-AG levels among the diabetic patients and significant between-gender difference in nondiabetic subjects were observed.
authors.affiliation: Central Laboratory, Shanghai Xuhui Central Hospital, 966 Huaihai Middle Road, Shanghai 200031, China.
authors.forename: Shuijun
authors.initials: S
authors.lastname: Li
authors.forename: Xiaoxiang
authors.initials: X
authors.lastname: Heng
authors.forename: Hongguang
authors.initials: H
authors.lastname: Sheng
authors.forename: Yiping
authors.initials: Y
authors.lastname: Wang
authors.forename: Chen
authors.initials: C
authors.lastname: Yu
mesh_terms: D015415:Biomarkers / Q000032:analysis*; D016022:Case-Control Studies; D002853:Chromatography, Liquid / Q000379:methods*; D003847:Deoxyglucose / Q000097:blood*; D003924:Diabetes Mellitus, Type 2 / Q000097:blood*; D005260:Female; D006801:Humans; D016014:Linear Models; D008297:Male; D012015:Reference Standards; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D012727:Sex Characteristics; D021241:Spectrometry, Mass, Electrospray Ionization / Q000379:methods*; D053719:Tandem Mass Spectrometry / Q000379:methods*
chemical_list: D015415:Biomarkers; C006584:1,5-anhydroglucitol; D003847:Deoxyglucose